@article{PismaZhETF.26.381,
    title = {Observation of periodic gamma radiation from the discrete source Cygnus X-3},
    author = {Gal'per, A. M. and Kirillov-Ugryumov, V. G. and Kurochkin, A. V. and Leikov, N. G. and Luchkov, B. I. and Yurkin, Yu. T.},
    journal = {Письма в ЖЭТФ},
    volume = {26},
    issue = {5},
    pages = {381},
    year = {1977},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_20904.shtml},
}